B) The symbol ":-)" represents a smiley face emoticon.

Explanation:
- The symbol ":-)" is a combination of three characters: a colon (:) followed by a hyphen (-) and a closing parenthesis ()).
- When these characters are arranged in this particular order, they form a representation of a smiling face.
- This symbol is commonly used in written communication, such as text messages, emails, and social media posts, to convey a sense of happiness, joy, or friendliness.

Smiley Face Emoticon:
- The smiley face emoticon, represented by ":-)", is a simple way to express positive emotions or intentions in written form.
- The colon (:) represents the eyes of the face, the hyphen (-) represents the nose, and the closing parenthesis ()) represents the mouth.
- When viewed sideways, the combination of these characters resembles a smiling face, hence the name "smiley face."

Usage and Meaning:
- The smiley face emoticon is often used to indicate humor, happiness, or friendliness in a text-based conversation.
- It can help convey positive emotions and tone that may be difficult to express solely through words.
- For example, if someone tells a joke or a funny story, responding with ":-)" can indicate that you found it amusing.
- Similarly, if you want to show appreciation or gratitude, using the smiley face emoticon can add a sense of warmth and positivity to your message.

Variations:
- The basic smiley face emoticon ":-)" has evolved over time, and there are now many variations and adaptations.
- For example, ":-D" represents a wider smile with an open mouth, while ":)" represents a simpler, more neutral smile.
- Additionally, other symbols and characters can be combined with the basic smiley face to create different expressions and emotions.

Conclusion:
In summary, the symbol ":-)" represents a smiley face emoticon used to convey positive emotions, humor, and friendliness in written communication. It is a widely recognized symbol that adds warmth and positivity to text-based conversations.